Regulations & Permits

Use this portal to filter and search for all of our regulatory information.

We oversee many state and federal laws designed to protect Washington's land, air, and water. See our laws, rules, & rulemaking page for more information about our current rules and rulemaking.

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Chapter 173-441 & 173-446 WAC, Cap-and-Invest Linkage

This is the rulemaking page for Chapters 173-441 and 173-446.

https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/rulemaking/wac-173-441-446-linkage

Chapter 173-443 WAC Hydrofluorocarbons

This is the rulemaking page for Chapter 173-443 WAC.

https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/rulemaking/wac-173-443-hydrofluorocarbons

Chapter 173-423 WAC – Clean Vehicles Program

This is the rulemaking page for Chapter 173-423 WAC

https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/rulemaking/wac-173-423

Chapter 173-446 WAC – Climate Commitment Act Program Rule

This is the rulemaking page for Chapter 173-446 WAC.

https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/closed-rulemaking/wac-173-446

Chapter 173-446A WAC

This is the rulemaking page for Chapter 173-446A WAC.

https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/closed-rulemaking/wac-173-446a

Chapter 173-446 WAC – Allowance Price Containment Reserve

This is the rulemaking page for Chapter 173-446 WAC, Allowance Price Containment Reserve.

https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/closed-rulemaking/wac-173-446-apcr

Millennium Bulk Terminals Longview

Millennium proposed a coal export terminal at the former Reynolds smelter in Cowlitz County.

https://ecology.wa.gov/regulations-permits/sepa/environmental-review/sepa-at-ecology/millennium

Contanda expansion proposal

Contanda, formerly Westway Terminal, proposed an expansion of the Grays Harbor methanol terminal.

https://ecology.wa.gov/regulations-permits/sepa/environmental-review/sepa-at-ecology/grays-harbor-terminal-expansion/contanda

Grays Harbor terminal expansion environmental reviews

The current status of environmental reviews for two oil-related proposals in Grays Harbor.

https://ecology.wa.gov/regulations-permits/sepa/environmental-review/sepa-at-ecology/grays-harbor-terminal-expansion

Goldendale Energy Storage Project

Environmental review and permitting for the proposed Goldendale Energy Storage Project.

https://ecology.wa.gov/regulations-permits/permits-certifications/industrial-facilities-permits/goldendale-energy

WAC 173-166 Emergency drought relief

This is the rulemaking page for Chapter 173-166 WAC.

https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/rulemaking/wac-173-166

Imperium expansion proposal

Imperium Terminal Services proposed expanding its existing transport facility in Hoquiam.

https://ecology.wa.gov/regulations-permits/sepa/environmental-review/sepa-at-ecology/grays-harbor-terminal-expansion/imperium-expansion-proposal

Revised Diesel Engine Exhaust Particulate Matter Health Risk Assessment Report Quincy, Washington

This report is a final health risk assessment (HRA) of diesel particles from some Quincy data centers.

https://ecology.wa.gov/20180806healthdieseldatacenter

TransAlta Best Available Retrofit Technology (BART) order, second revision, 7/29/20

This is the second revised TransAlta Best Available Retrofit Technology (BART) order, 7/29/20.

https://ecology.wa.gov/20200729transaltabartorderrevised

Air Quality data for Intalco Storymap

A table showing the number of days in each Air Quality Index category near Intalco

https://ecology.wa.gov/20200414-intalcostorymap

2022FinalRegistrationBudget

Final 2022-2023 Budget for Air Quality Registration

https://ecology.wa.gov/2022finalregistrationbudget

2017 and 2018 air quality days

A color coded chart showing the air quality days from good to very unhealthy for 2017 and 2018.

https://ecology.wa.gov/2019aqigraphic1718-alt

The Tri-Cities Ozone Precursor Study

A report on the ozone study conducted in the Tri-Cities area.

https://ecology.wa.gov/20171212tricitiesozoneprecursorstudy

Air Operating Permit Report for Fiscal Years 2022 and 2023, updated November 2021

This is the workload analysis and budget report for the Air Operating Permit Program for Fiscal Years 2022 and 2023, updated November 2021.

https://ecology.wa.gov/202111aopreportfy22

VW federal Electric School Bus Grant Awards

A breakdown of VW federal grant awards for electric school buses by county and school district.

https://ecology.wa.gov/asset-collections-doc-assets-air-quality-vw-20200427-vwfed-elecschoolbusawards-alt